SIMO MOTOR's Analysis and Judgment Experience on Motor Winding Grounding and Burnout Issues
First, Low-voltage Motor Phase Loss Operation
If one or two phases of the three-phase windings completely turn tan/brown, it is generally caused by phase loss operation.
The cause of phase loss operation usually lies in the power supply system, and rarely occurs inside the motor (e.g., broken connection or lead wire).
When this situation occurs, first check if there is a broken connection or a burnt lead wire. Otherwise, the issue belongs to the power supply line and is not related to the motor itself.
Second, when all three phases of the motor windings turn black, it indicates that the motor has been operating under prolonged overload (overcurrent), and this is not a motor manufacturing quality issue.
Third, if the overall insulation color of the windings remains unchanged, but there is a local turn-to-turn or ground short circuit, it generally falls under a product quality issue.
To solve such motor winding burnout problems, it is generally necessary to replace the windings and also replace any damaged components.
Efficiency leap Precision and stability
To avoid these problems, SIMO MOTOR summarizes some maintenance precautions:
The insulation resistance of the windings should be measured every time the motor is stopped before it is started again.
If the insulation resistance value is relatively low after the motor has been stored for a long time, or if there are obvious signs of moisture, corresponding treatment should be applied to the motor to restore the insulation resistance value to normal before starting the motor.
If the motor is started rashly knowing that the insulation resistance is relatively low, it can cause winding breakdown issues.
